Add a Digital Signature to a PDF Document

Create and use signatures

To sign PDFs, you can capture your signature using the built-in camera on your Mac, or your iPhone or iPad.

1. Open the Preview app on your Mac, click the Show Markup Toolbar button  (if the Markup toolbar isn’t showing), then click the Sign button

2. Create your signature:

On your Computer: Sign your name on a white piece of paper, then Click Camera. Hold your paper signature facing the camera so that your signature is level with the blue line in the window. When your signature appears in the window, click Done. If you don’t like the results, click Clear, then try again.

OR

On your iPad or iPhone: Click Select Device to choose a device (if more than one is available). On your device, use your finger or Apple Pencil (on iPad) to sign your name, then tap Done. If you don’t like the results, tap Clear, then try again.

3. Add your signature to your document:

Click the Sign button, then click the signature to add it to your PDF. (If you used VoiceOver to add descriptions of your signatures, VoiceOver reads the descriptions as you navigate the list of signatures.)

4. Choose the signature you want to use (from the Sign button), drag it to where you want it, then use the handles to adjust the size.